THE DIFFUSION PROCESS OF FLUORESCENCE PROBE IN MEASUREMENT OF LCST OF POLY(N-ISOPROPYLACRYLAMIDE-co-ACRYLAMIDE) AQUEOUS SOLUTION

doi:10.7517/j.issn.1674-0475.2000.03.208

Abstract

Abstract: The copolymers of N-isopropylacrylamide and acrylamide with different ratios were synthesized.The transition process of coil configuration of the co-polymeric molecule to globule in solution and the diffusion process of fluorescence probe molecule into globule were investigated.The kinetic process and the activation energy of diffusion were measured and discussed.Results indicate that the larger of the ratio of AM composed in copolymer,the looser of the structure of globule obtained.In addition,it is worthy to note that if the mixing method is used for the introduction of fluorescence probe for the measurement of the lower critical solution temperature (LCST),the diffusion process must be considered carefully.

Key words: N-isopropylacrylamide copolymer, LCST, fluorescence probe, kinetics of diffusion process

CLC Number:

O644

LI Jun, SHI Xiang-yang, WU Shi-kang . THE DIFFUSION PROCESS OF FLUORESCENCE PROBE IN MEASUREMENT OF LCST OF POLY(N-ISOPROPYLACRYLAMIDE-co-ACRYLAMIDE) AQUEOUS SOLUTION[J]. Imaging Science and Photochemistry, 2000, 18(3): 208-213.

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